CN113567264A - An experimental device and experimental method that can simultaneously simulate high voltage and high temperature of GIL inner conductor - Google Patents
An experimental device and experimental method that can simultaneously simulate high voltage and high temperature of GIL inner conductor Download PDFInfo
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- CN113567264A CN113567264A CN202110976234.XA CN202110976234A CN113567264A CN 113567264 A CN113567264 A CN 113567264A CN 202110976234 A CN202110976234 A CN 202110976234A CN 113567264 A CN113567264 A CN 113567264A
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- 239000012212 insulator Substances 0.000 claims abstract description 36
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- 230000007547 defect Effects 0.000 claims description 9
- 238000004088 simulation Methods 0.000 claims description 7
- 238000012544 monitoring process Methods 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 239000003292 glue Substances 0.000 claims description 3
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- 239000007787 solid Substances 0.000 description 1
- SFZCNBIFKDRMGX-UHFFFAOYSA-N sulfur hexafluoride Chemical compound FS(F)(F)(F)(F)F SFZCNBIFKDRMGX-UHFFFAOYSA-N 0.000 description 1
- 229960000909 sulfur hexafluoride Drugs 0.000 description 1
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Abstract
本发明公开了一种可同时模拟GIL内导体高电压和高温度的实验装置及实验方法，包括热油循环机、第一段GIL腔体、第二段GIL腔体和高压实验电源，热油循环机上设有热油循环机热油出口和热油循环机冷油入口，第一段GIL腔体和第二段GIL腔体间设有盆式绝缘子，盆式绝缘子上设有金属触头，第一段GIL腔体内设有中空加热导电杆，中空加热导电杆的一端设有GIL腔体热油入口和GIL腔体冷油出口，中空加热导电杆的另一端插入金属触头中，第一段GIL腔体上设有观察窗，第二段GIL腔体上设有高电压终端，高电压终端通过送电杆与金属触头相连，高电压终端和高压实验电源相连，安全可靠、密封性好，并能够同时模拟GIL内导体高电压和高温度条件。
The invention discloses an experimental device and an experimental method capable of simulating the high voltage and high temperature of a GIL inner conductor at the same time, including a hot oil circulation machine, a first-stage GIL cavity, a second-stage GIL cavity, a high-voltage experimental power supply, and a hot oil The circulation machine is provided with the hot oil outlet of the hot oil circulation machine and the cold oil inlet of the hot oil circulation machine, a basin-type insulator is arranged between the first section of the GIL cavity and the second section of the GIL cavity, and the basin-type insulator is provided with a metal contact. The first section of the GIL cavity is provided with a hollow heating conductive rod, one end of the hollow heating conductive rod is provided with the GIL cavity hot oil inlet and the GIL cavity cold oil outlet, and the other end of the hollow heating conductive rod is inserted into the metal contact, the first There is an observation window on the cavity of the first section of GIL, and a high-voltage terminal is set on the second section of the GIL cavity. Good and able to simulate both high voltage and high temperature conditions in the GIL inner conductor.
Description
Technical Field
The invention relates to the field of GIL operation, maintenance and protection, in particular to an experimental device and an experimental method capable of simulating high voltage and high temperature of a GIL inner conductor at the same time.
Background
Gas insulated transmission line (GIL) technology is becoming mature and its application in the field of power transmission is increasing. However, there are many solid insulation parts in the GIL, which are prone to partial discharge under high voltage operating conditions and cause insulation failure of the GIL device. In addition, the GIL passes large currents during operation and causes a temperature rise in the GIL inner conductor. The mechanism of defect development in GIL is also different from that of a single factor under the combined action of high voltage and high temperature. Therefore, in order to improve the operation stability of the GIL, it is necessary to simulate the voltage and high temperature environment within the GIL in order to experimentally study the development mechanism of the insulation defect thereof.
However, the conventional high temperature simulation method is generally performed by using a current booster to output a large current to the GIL device. If high voltage is applied at the same time, the potential of the current booster is raised, which seriously threatens the operation safety environment of experimenters. In addition, the method has low heating efficiency, high temperature control difficulty and high kiloampere current simulation difficulty, and the defects seriously limit the implementation of related tests.
Disclosure of Invention
According to the defects of the prior art, the invention aims to provide the experimental device and the experimental method which can simultaneously simulate the high voltage and the high temperature of the GIL inner conductor, are safe and reliable, have good sealing performance and can simultaneously simulate the conditions of the high voltage and the high temperature of the GIL inner conductor.
In order to solve the technical problems, the invention adopts the technical scheme that:
an experimental device capable of simulating high voltage and high temperature of a GIL inner conductor simultaneously comprises a hot oil circulator, a first section of GIL cavity, a second section of GIL cavity and a high-voltage experimental power supply, wherein a hot oil outlet of the hot oil circulator and a cold oil inlet of the hot oil circulator are arranged on the hot oil circulator, one end of the first section of GIL cavity is sealed with one end of the second section of GIL cavity, a basin-type insulator is arranged between the other end of the first section of GIL cavity and the other end of the second section of GIL cavity, a metal contact is arranged on the basin-type insulator, a hollow heating conductive rod is arranged in the first section of GIL cavity, a GIL cavity hot oil inlet and a GIL cavity cold oil outlet are arranged at one end of the hollow heating conductive rod, the hot oil outlet of the hot oil circulator and the hot oil inlet of the GIL cavity are connected through a hot oil pipe, the cold oil inlet of the hot oil circulator and the cold oil outlet of the GIL cavity are connected through a cold oil pipe, the other end of cavity heating conducting rod inserts in the metal contact, be equipped with on the first section GIL cavity and observe the observation window of cavity heating conducting rod, be equipped with on the first section GIL cavity and be used for evacuation and gas filled first inflation valve, be equipped with on the second section GIL cavity and be used for evacuation and gas filled second inflation valve, be equipped with high voltage terminal on the second section GIL cavity, high voltage terminal through send the pole with metal contact links to each other, high voltage terminal pass through high-voltage wire with the high-voltage experiment power links to each other.
Further, an insulating umbrella skirt is arranged between the high-voltage terminal and the second section GIL cavity, the insulating umbrella skirt is connected with the second section GIL cavity through a first flange, one part of the power transmission rod is arranged in the insulating umbrella skirt, and the other part of the power transmission rod is arranged in the second section GIL cavity.
Furthermore, pressure gauges are arranged on the first inflation valve and the second inflation valve.
Furthermore, the observation window is made of quartz glass, and the observation window is connected with the first section of GIL cavity through a third flange.
Further, the hollow heating conducting rod is of a hollow rod body structure with two sealed ends, the hollow heating conducting rod comprises a hollow heating conducting rod head section, a hollow insulator and a hollow heating conducting rod tail section which are sequentially connected, metal shielding rings are arranged on two sides of the hollow insulator, and the hollow heating conducting rod head section is connected with the first section of GIL cavity.
Furthermore, the first section of the hollow heating conducting rod, the tail section of the hollow heating conducting rod and the edges of the contact surface of the hollow insulator and the metal shielding ring are all subjected to fillet treatment.
Furthermore, an insulating inner tube is arranged in the hollow heating conducting rod, one end of the insulating inner tube extends out of the first section of GIL cavity to serve as a GIL cavity hot oil inlet, the other end of the insulating inner tube is suspended and opened, a metal bent tube is arranged on the hollow heating conducting rod, one end of the metal bent tube is communicated with the hollow heating conducting rod, and the other end of the metal bent tube extends out of the first section of GIL cavity to serve as a GIL cavity cold oil outlet.
Furthermore, one end of the insulating inner tube is fixed on the first section of the hollow heating conducting rod through sealing glue.
Further, a second flange is arranged between the first section of GIL cavity and the second section of GIL cavity, the basin-type insulator is arranged on the second flange, a first end cover used for sealing is arranged on the first section of GIL cavity, a hot oil inlet of the GIL cavity and a cold oil outlet of the GIL cavity are arranged on the first end cover, and a second end cover used for sealing is arranged on the second section of GIL cavity.
An experimental method for simultaneously simulating high voltage and high temperature of a GIL inner conductor is characterized by comprising the following steps:
and 5, turning on a high-voltage experiment power supply, gradually increasing the voltage to a set value, and starting a high-voltage and high-temperature operation simulation experiment.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the experimental device and the experimental method capable of simultaneously simulating the high voltage and the high temperature of the conductor in the GIL can simultaneously simulate the high voltage and the high temperature running conditions of the hollow heating conducting rod in the GIL.
2. According to the experimental device and the experimental method capable of simulating the high voltage and the high temperature of the conductor in the GIL simultaneously, the hollow heating conducting rod in the GIL is heated by the thermal insulation oil, electrical insulation is provided between the heating device and the high voltage device through the basin-type insulator and the insulation oil, the high voltage device is prevented from influencing the operation safety of the temperature rise device, and the safety is higher.
3. The experimental device and the experimental method capable of simulating the high voltage and the high temperature of the GIL inner conductor simultaneously have the advantages of convenience in temperature rise, high heating efficiency and accuracy in temperature control.
4. The experimental device and the experimental method capable of simulating the high voltage and the high temperature of the GIL inner conductor simultaneously are provided with the observation window, so that the reaction can be observed conveniently.
Drawings
FIG. 1 is a schematic diagram of the overall composition and connection of the experimental apparatus according to the present invention.
FIG. 2 is a schematic diagram of the structure of the first and second GIL cavities according to the present invention.
Fig. 3 is a schematic view of the structure of the hollow heating conductive rod of the present invention.
FIG. 4 is a partial block diagram of the apparatus of the present invention with insulation defects deployed.
Wherein: 1. a hot oil circulator; 11. a cold oil inlet of the hot oil circulator; 12. a hot oil outlet of the hot oil circulator; 13. a cold oil pipe; 14. a hot oil pipe; 15. a high-voltage wire; 2. a first section of a GIL cavity; 21. a GIL cavity cold oil outlet; 22. a GIL cavity hot oil inlet; 23. a hollow heating conductive rod; 231. a first section of a hollow heating conducting rod; 232. a hollow heating conducting rod tail section; 233. a hollow insulator; 234. a metal shield ring; 235. an insulated inner tube; 236. a metal bent pipe; 24. an observation window; 25. a first inflation valve; 26. a second flange; 27. a third flange; 28. a first end cap; 3. a second section of GIL cavity; 31. a high voltage terminal; 32. a second inflation valve; 33. an insulating shed; 34. a power transmission pole; 35. a first flange; 36. a second end cap; 4. a high voltage experimental power supply; 5. a basin-type insulator; 51. and a metal contact.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.
In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.
Referring to fig. 1-4, an experimental apparatus capable of simultaneously simulating high voltage and high temperature of a GIL inner conductor comprises a hot oil circulator 1, a first GIL cavity 2, a second GIL cavity 3 and a high-voltage experimental power supply 4, wherein the hot oil circulator 1 is provided with a hot oil outlet 12 of the hot oil circulator and a cold oil inlet 11 of the hot oil circulator, one end of the first GIL cavity 2 is sealed with one end of the second GIL cavity 3, a basin-shaped insulator 5 is arranged between the other end of the first GIL cavity 2 and the other end of the second GIL cavity 3, the basin-shaped insulator 5 is provided with a metal contact 51, a hollow heating conductive rod 23 is arranged in the first GIL cavity 2, one end of the hollow heating conductive rod 23 is provided with a GIL cavity hot oil inlet 22 and a GIL cavity cold oil outlet 21, the hot oil outlet 12 of the hot oil circulator and the GIL cavity hot oil inlet 22 are connected through a hot oil pipe 14, and the cold oil inlet 11 of the hot oil circulator and the GIL cavity cold oil outlet 21 are connected through a cold oil pipe 13, the other end of the hollow heating conducting rod 23 is inserted into the metal contact 51, the first section GIL cavity 2 is provided with the observation window 24, the first section GIL cavity 2 is provided with the first inflation valve 25 for vacuumizing and inflating, the second section GIL cavity 3 is provided with the second inflation valve 32 for vacuumizing and inflating, the second section GIL cavity 3 is provided with the high-voltage terminal 31, the high-voltage terminal 31 is connected with the metal contact 51 through the power transmission rod 34, and the high-voltage terminal 31 is connected with the high-voltage experimental power supply 4 through the high-voltage lead 15.
In the use process of the experimental device: arranging a defect model and monitoring equipment in a first section GIL cavity 2, arranging a hollow heating conducting rod 23 in the first section GIL cavity 2, arranging a basin-type insulator 5 between the first section GIL cavity 2 and a second section GIL cavity 3, connecting a hot oil outlet 12 of a hot oil circulator and a hot oil inlet 22 of the GIL cavity through a hot oil pipe 14, connecting a cold oil inlet 11 of the hot oil circulator and a cold oil outlet 21 of the GIL cavity through a cold oil pipe 13, connecting a high-voltage terminal 31 with a metal contact 51 through a power transmission rod 34, connecting the high-voltage terminal 31 with a high-voltage experimental power supply 4 through a high-voltage lead 15, opening a second inflation valve 32, and filling the second section GIL cavity 3 with insulating gas, such as SF (sulfur hexafluoride) gas6Insulating the second section GIL cavity 3 from the power transmission rod 34, opening the first inflation valve 25, vacuumizing the first section GIL cavity 2, filling insulating gas, and filling SF6Or other insulating gas to be researched, the first section GIL cavity 2 and the hollow heating conducting rod 23 are insulated, the hot oil circulator 1 is opened, and the insulating oil is circularly heated in the hollow heating conducting rod 23 through the cold oil inlet 11, the hot oil outlet 12, the cold oil pipe 13, the hot oil pipe 14, the GIL cavity cold oil outlet 21 and the GIL cavity hot oil inlet 22 of the hot oil circulator until the temperature of the hollow heating conducting rod 23 reaches the required temperatureThe temperature, turn on the high-voltage experimental power 4, step-by-step raise the voltage to the required high voltage, begin to carry on the simulation experiment of high voltage and high temperature of the hollow heating conducting rod 23 in the first section GIL cavity 2 at the same time, the function of the basin-type insulator 5 is to introduce the high voltage to the hollow heating conducting rod 23 through the high-voltage terminal 31 and through the pole 34, in addition, under normal circumstances, the first section GIL cavity 2 is grounded, therefore the hollow heating conducting rod 23 of high voltage can not contact with the first section GIL cavity 2 directly, the basin-type insulator 5 can be used as the insulating support to separate the hollow heating conducting rod 23 from the first section GIL cavity 2, prevent the pole 34 from introducing the high voltage to the first section GIL cavity 2, of course, the basin-type insulator 5 has good leakproofness, make the first section GIL cavity 2 and the second section GIL cavity 3 work separately, can prevent the insulating gas in the first section GIL cavity 2 from flowing into the second section GIL cavity 3, because the first section GIL cavity 2 is a main functional area and provides an experimental environment for insulation test, the pressure and the type of the insulation gas are determined according to the experiment and can be changed according to the experiment, while the second section GIL cavity 3 is used for providing high voltage for the hollow heating conducting rod 23, and the second section GIL cavity 3 is not changed after being filled with the insulation gas.
In addition, in the first section GIL cavity 2, a lot of discharge or chemical reactions can occur, which can decompose and deteriorate the insulating gas in the first section GIL cavity 2, if the insulating gas flows into the second section GIL cavity 3, the gas purity and the insulating level of the second section GIL cavity 3 can be seriously affected, and the insulating property of the whole device is reduced, so that the second section GIL cavity 3 and the first section GIL cavity 2 can be isolated through the basin-type insulator 5.
The high temperature and high voltage conditions of the actual GIL during operation, specifically the temperature and voltage to be simulated, need to be set according to user requirements or on-site GIL operating standards. For example, to simulate the operation of 550kV and 120 degrees, the high voltage experimental power supply 4 is turned on, the voltage is gradually increased to 550kV, and the insulating oil is heated to 120 degrees by the hot oil circulator 1 and then introduced into the hollow heating conductive rod 23.
Preferably, the hot oil circulator 1 adopts insulating oil as a heat medium for thermal circulation, and the insulating oil can be used as the heat medium and can also provide insulation between the hollow heating conductive rod 23 and the hot oil circulator 1, so that the hollow heating conductive rod 23 is prevented from discharging to the hot oil circulator 1 through the heat medium, and adverse effects are caused on simulation experiments of high voltage and high temperature of conductors in the GIL.
Referring to fig. 1 and 2, an insulating shed 33 is disposed between the high-voltage terminal 31 and the second GIL cavity 3, the first GIL cavity 2 is cylindrical, the second GIL cavity 3 is T-shaped, the insulating shed 33 and the second GIL cavity 3 are connected by a first flange 35, a part of the power transmission rod 34 is disposed in the insulating shed 33, and another part of the power transmission rod is disposed in the second GIL cavity 3. Since the high voltage terminal 31 is a metal, if it is directly connected to the second GIL cavity 3, it will be electrically connected to the second GIL cavity 3, so that a short circuit will occur when the high voltage terminal 31 is applied with a high voltage, and the purpose of the insulating shed 33 is similar to that of the basin-type insulator 5, in order to separate the second GIL cavity 3 from the power transmission rod 34 to which a high voltage is applied.
Pressure gauges are arranged on the first inflation valve 25 and the second inflation valve 32 respectively and used for monitoring pressure changes in the first section GIL cavity 2 and the second section GIL cavity 3.
The observation window 24 is made of quartz glass, so that the influence on the observation of the partial discharge ultraviolet signal is prevented, and the observation window 24 is connected with the first section GIL cavity 2 through a third flange 27 for sealing.
Referring to fig. 3, the hollow heating conductive rod 23 is a hollow rod structure with two sealed ends, so that the insulating oil can pass through the hollow heating conductive rod 23, simulate the high temperature of the conductor in the GIL, and set the hollow heating conductive rod 23 to the rod structure with two sealed ends, thereby preventing the leakage of the insulating oil. The hollow heating conductive rod 23 comprises a first section 231, a hollow insulator 233 and a tail section 232 which are connected in sequence, and metal shielding rings 234 are arranged on two sides of the hollow insulator 233. Through setting up hollow insulator 233, the hollow purpose of hollow insulator 233 is in letting insulating oil flow into hollow heating conducting rod 23, in addition, because cavity heating conducting rod 23 in the first section 231 of hollow heating conducting rod links to each other with first section GIL cavity 2, cavity heating conducting rod tail 232 is the low-voltage, cavity heating conducting rod tail 232 links to each other with basin formula insulator 5, cavity heating conducting rod tail 232 is the high-voltage, do not add hollow insulator 233 and insulate, be equivalent to the short circuit, then can not carry out the experiment of simulating GIL inner conductor high voltage and high temperature simultaneously.
In addition, because the electric field distortion is easily generated at the two ends of the hollow insulator 233, and the insulating gas is easily subjected to faults such as partial discharge and breakdown under the distorted electric field, the operation stability of the device is seriously affected, and the electric field distortion can be weakened through the additional metal shielding ring 234, so that the safety and the stability of the device are improved.
An insulating inner tube 235 is arranged in the hollow heating conducting rod 23, one end of the insulating inner tube 235 extends out of the first section of GIL cavity 2 to serve as a GIL cavity hot oil inlet 22, the other end of the insulating inner tube is suspended and opened, a metal bent tube 236 is arranged on the hollow heating conducting rod 23, one end of the metal bent tube 236 is communicated with the hollow heating conducting rod 23, the other end of the metal bent tube 236 extends out of the first section of GIL cavity 2 to serve as a GIL cavity cold oil outlet 21, the insulating inner tube 235 is used for guiding hot insulating oil into the hollow heating conducting rod 23, the insulating inner tube 235 needs to penetrate through the first section of GIL cavity 2 and is connected with the hot oil outlet 12 of the hot oil circulator through a hot oil pipe 14, if the insulating inner tube 235 is contacted with the hollow heating conducting rod 23 for some reasons, and the material of the insulating inner tube 235 is not insulating, a high voltage can be directly connected with a low voltage of the first section of GIL cavity 2, and short circuit of the device is caused. Therefore, for safety, the inner insulating tube 235 is made of an insulating material and has one end extending out of the first GIL cavity 2 as the hot oil inlet 22 of the GIL cavity and the other end being suspended and opened.
The edges of the contact surfaces of the hollow heating conductive rod head section 231, the hollow heating conductive rod tail section 232 and the hollow insulator 233 and the metal shielding ring 234 are all subjected to fillet treatment, so that corona and creeping discharge are prevented.
One end of the inner insulating tube 235 is fixed to the first section 231 of the hollow heating conductive rod by sealing glue, so as to ensure the sealing performance of the second section GIL cavity 3 and the hollow heating conductive rod 23.
With reference to fig. 1 and 2, a strict sealing environment is required to be formed in the GIL cavity, because during actual operation of the GIL, the cavity is filled with high-pressure insulating gas, which requires that the device should have high air tightness to prevent the insulating gas filled in the device from leaking out, a second flange 26 is arranged between the first GIL cavity 2 and the second GIL cavity 3, the basin-shaped insulator 5 is arranged on the second flange 26, a first end cover 28 for sealing is arranged on the first GIL cavity 2, a hot oil inlet 22 and a cold oil outlet 21 of the GIL cavity are arranged on the first end cover 28, and a second end cover 36 for sealing is arranged on the second GIL cavity 3.
With reference to fig. 1 to 4, the present invention further provides an experimental method for simultaneously simulating high voltage and high temperature of a GIL inner conductor, comprising:
and 5, turning on the high-voltage experiment power supply 3, gradually increasing the voltage to a set value, and starting the high-voltage and high-temperature operation simulation experiment.
In step 1, an insulating shed 33 is provided between the high-voltage terminal 31 and the second GIL cavity 3, and a part of the power transmission rod 34 is provided in the insulating shed 33 and the other part is provided in the second GIL cavity 3.
In step 1, the hollow heating conductive rod 23 is a hollow rod structure with two sealed ends, the hollow heating conductive rod 23 includes a first hollow heating conductive rod section 231, a hollow insulator 233 and a tail hollow heating conductive rod section 232 which are connected in sequence, both sides of the hollow insulator 233 are provided with metal shielding rings 234, and the first hollow heating conductive rod section 231 in the hollow heating conductive rod 23 is connected with the first GIL cavity 2.
In step 1, an insulating inner tube 235 is arranged in the hollow heating conducting rod 23, one end of the insulating inner tube 235 extends out of the first section of GIL cavity 2 to serve as a GIL cavity hot oil inlet 22, the other end of the insulating inner tube is suspended and opened, a metal bent tube 236 is arranged on the hollow heating conducting rod 23, one end of the metal bent tube 236 is communicated with the hollow heating conducting rod 23, and the other end of the metal bent tube extends out of the first section of GIL cavity 2 to serve as a GIL cavity cold oil outlet 21.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (10)
1. The utility model provides a can simulate experimental apparatus of GIL inner conductor high voltage and high temperature simultaneously which characterized in that: the device comprises a hot oil circulator, a first section of GIL cavity, a second section of GIL cavity and a high-voltage experimental power supply, wherein a hot oil outlet and a cold oil inlet of the hot oil circulator are arranged on the hot oil circulator, one end of the first section of GIL cavity is sealed with one end of the second section of GIL cavity, a basin-type insulator is arranged between the other end of the first section of GIL cavity and the other end of the second section of GIL cavity, a metal contact is arranged on the basin-type insulator, a hollow heating conducting rod is arranged in the first section of GIL cavity, a GIL cavity hot oil inlet and a GIL cavity cold oil outlet are arranged at one end of the hollow heating conducting rod, the hot oil outlet of the hot oil circulator and the GIL cavity hot oil inlet are connected through a hot oil pipe, the cold oil inlet of the hot oil circulator and the GIL cavity cold oil outlet are connected through a cold oil pipe, and the other end of the hollow heating conducting rod is inserted into the metal contact, the hollow heating conductive rod structure is characterized in that an observation window capable of observing the hollow heating conductive rod is arranged on the first section GIL cavity, a first inflation valve used for vacuumizing and inflating is arranged on the first section GIL cavity, a second inflation valve used for vacuumizing and inflating is arranged on the second section GIL cavity, a high-voltage terminal is arranged on the second section GIL cavity, the high-voltage terminal is connected with the metal contact through a power transmission rod, and the high-voltage terminal is connected with the high-voltage experiment power supply through a high-voltage wire.
2. The experimental apparatus for simulating high voltage and high temperature of GIL inner conductor simultaneously as claimed in claim 1, wherein: high voltage terminal with be equipped with insulating full skirt between second section GIL cavity, insulating full skirt with second section GIL cavity links to each other through first flange, send some of pole to establish in the insulating full skirt, another part establishes in the second section GIL cavity.
3. The experimental apparatus for simulating high voltage and high temperature of GIL inner conductor simultaneously as claimed in claim 1, wherein: pressure gauges are arranged on the first inflation valve and the second inflation valve.
4. The experimental apparatus for simulating high voltage and high temperature of GIL inner conductor simultaneously as claimed in claim 1, wherein: the observation window is made of quartz glass, and the observation window is connected with the first section of GIL cavity through a third flange.
5. The experimental apparatus for simulating high voltage and high temperature of GIL inner conductor simultaneously as claimed in claim 1, wherein: the hollow heating conducting rod is of a hollow rod body structure with two sealed ends, and comprises a hollow heating conducting rod first section, a hollow insulator and a hollow heating conducting rod tail section which are sequentially connected, wherein metal shielding rings are arranged on two sides of the hollow insulator, and the hollow heating conducting rod first section is connected with the first section GIL cavity.
6. The experimental apparatus for simulating high voltage and high temperature of GIL inner conductor simultaneously as claimed in claim 5, wherein: and the edges of the contact surfaces of the first section of the hollow heating conducting rod, the tail section of the hollow heating conducting rod and the hollow insulator and the metal shielding ring are all subjected to fillet treatment.
7. The experimental apparatus for simulating high voltage and high temperature of GIL inner conductor simultaneously as claimed in claim 5, wherein: be equipped with insulating inner tube in the cavity heating conducting rod, the one end of insulating inner tube stretches out first section GIL cavity is as GIL cavity hot oil entry, and the other end is unsettled and open, be equipped with the metal return bend on the cavity heating conducting rod, the one end of metal return bend with cavity heating conducting rod intercommunication, the other end stretches out first section GIL cavity is as GIL cavity cold oil export.
8. The experimental apparatus for simulating high voltage and high temperature of GIL inner conductor simultaneously as claimed in claim 6, wherein: one end of the insulating inner tube is fixed on the first section of the hollow heating conducting rod through sealing glue.
9. The experimental apparatus for simulating high voltage and high temperature of GIL inner conductor simultaneously as claimed in claim 1, wherein: the first section GIL cavity with be equipped with the second flange between the second section GIL cavity, the basin formula insulator is established on the second flange, be equipped with on the first section GIL cavity and be used for sealed first end cover, GIL cavity hot oil entry with GIL cavity cold oil export is established on the first end cover, be equipped with on the second section GIL cavity and be used for sealed second end cover.
10. An experimental method for simultaneously simulating high voltage and high temperature of a GIL inner conductor, which uses the experimental apparatus for simultaneously simulating high voltage and high temperature of a GIL inner conductor according to any one of claims 1 to 9, comprising:
step 1, arranging a defect model and monitoring equipment in a first section of GIL cavity;
step 2, opening a second inflation valve, vacuumizing and filling insulating gas into the second section of GIL cavity, so that the second section of GIL cavity is insulated from the power transmission pole;
step 3, opening a first inflation valve, vacuumizing the first section of GIL cavity, filling insulating gas into the first section of GIL cavity, and checking the air tightness of the device;
step 4, opening the hot oil circulator, and circularly heating the insulating oil in the hollow heating conductive rod through a cold oil inlet of the hot oil circulator, a hot oil outlet of the hot oil circulator, a cold oil pipe, a hot oil pipe, a GIL cavity cold oil outlet and a GIL cavity hot oil inlet until the temperature meets the set requirement;
and 5, turning on a high-voltage experiment power supply, gradually increasing the voltage to a set value, and starting a high-voltage and high-temperature operation simulation experiment.
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